It was practically unthinkable when Porsche introduced the Cayenne in 2002. An SUV... from Porsche? Purists balked, but customers flocked, and the Cayenne propelled the its holding company into such profitability that it practically took over the entire Volkswagen Group. It's now been twelve years since the original Cayenne arrived as the first production Porsche with more than two doors, and Zuffenhausen has since followed up with the Panamera, the Macan and the second-generation Cayenne. But i

Porsche's working on a plug-in hybrid-electric (PHEV) powertrain for both its Cayenne and Panamera models, Motor Trend reports. The Cayenne SUV PHEV will likely debut in 2014, followed shortly by the Panamera, according to the publication. We've heard about the Panamera PHEV before, and that there would be a Cayenne PHEV as well isn't exactly a surprise.